He is accused of being a convicted felon in possession of firearms, and now faces up to 10 years in prison, probation and $250,000 (£192,000) in fines, according to the Las Cruces Sun-News.

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Media captionFive numbers that explain US border crisis

United Constitutional Patriots, a small volunteer group, argues it is helping US Border Patrol to deal with a surge in migrants crossing America's southern border. It is one of several militias operating in the region.